EP2932938A1 - Verfahren zur detektion der position von zahnimplantaten, dentalanalog zur durchführung des besagten verfahrens und system zur detektion der position von zahnimplantaten mit besagtem dentalanalog - Google Patents

Verfahren zur detektion der position von zahnimplantaten, dentalanalog zur durchführung des besagten verfahrens und system zur detektion der position von zahnimplantaten mit besagtem dentalanalog Download PDF

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Publication number
EP2932938A1
EP2932938A1 EP15163148.8A EP15163148A EP2932938A1 EP 2932938 A1 EP2932938 A1 EP 2932938A1 EP 15163148 A EP15163148 A EP 15163148A EP 2932938 A1 EP2932938 A1 EP 2932938A1
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EP
European Patent Office
Prior art keywords
dental
analog
transfer
impression
detecting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15163148.8A
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English (en)
French (fr)
Inventor
Fulvio Mario Solara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sodim Srl
Original Assignee
Sodim Srl
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sodim Srl filed Critical Sodim Srl
Publication of EP2932938A1 publication Critical patent/EP2932938A1/de
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0001—Impression means for implants, e.g. impression coping
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/004—Means or methods for taking digitized impressions
    • A61C9/0046—Data acquisition means or methods
    • A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • A61C9/0006—Impression trays

Definitions

  • the present invention relates to a method for detecting the position of dental implants.
  • the method according to the invention finds application in the field of dentistry and dental technology for detecting the position of dental implants and reproducing such position for manufacturing dental prostheses and similar products.
  • the present invention also relates to a dental analog that can be used for carrying out the above-mentioned method, as well as to a system for detecting the position of dental implants comprising said dental analog.
  • the final result is therefore highly dependent on the knowledge and experience of the dental technician and it is subject to inaccuracies due to human error.
  • the main object of the invention is to provide a method for detecting the position of dental implants which allows to overcome the problems and risks of errors related to the use of the above-mentioned methods.
  • Another object of the present invention is to provide a method for detecting the position of dental implants in which the obtained result is independent from the knowledge, skills and experience of the dentist or dental technician.
  • a further object of the present invention is to provide a method for detecting the position of dental implants which is not invasive.
  • the method for detecting the position of dental implants according to the invention essentially provides the steps of:
  • the measurements thus obtained can be directly used as an input for mathematical algorithms and/or softwares that allow - in a per se known manner - to obtain a dental prosthesis, a working model or the like.
  • the method according to the invention provides the use of dental analogs that comprise a first portion adapted to penetrate with precision and without causing errors or deformations into the impression left by the respective transfer assemblies in the impression material contained in the impression tray and a second portion protruding from the impression material and subject to measurement.
  • said first portion of said analog has a shape corresponding to the shape of the portion of the transfer assembly that penetrates into the impression material.
  • both the employed transfer assembly and dental analog will have a shape that enables the detection of the impression with great precision and that can assume a perfectly stable position in the impression tray.
  • said transfer assembly and said dental analog have a shape that prevents any undesired rotation, so that the correct angular position of the dental implant is exactly reproduced with high precision by the dental analog in the impression tray.
  • said transfer assembly and said dental analog have a shape that allows to remove the transfer assembly (or part of it) from the impression material and to insert the dental analog into said impression material with precision and without the risk of deformation.
  • the mating of the transfer assembly and of the dental analog with the impression material does not imply tensile, torsional, compressive or distortive maneuvers.
  • the second portion of the dental analog is shaped so as to replicate or represent the shape of a dental implant analog, possibly with a length variable according to the needs, and comprises an end portion having a shape suitable to be detected by known and commonly used measurement systems (contour followers, scanners, and so on).
  • the method according to the invention provides for the determination of the position of dental implants by means of detecting the position of the dental analogs - namely of the portion of said analogs that protrudes from the impression material - directly in the impression tray, by means of a process of "reverse engineering".
  • the method for detecting the position of dental implants essentially provides the steps of:
  • this method is carried out by using, for each dental implant, a transfer assembly made according to the teachings of Italian patent IT 1,410,054 .
  • the transfer assembly comprises at least one transfer 110 comprising a first portion 110a intended to be coupled with a dental implant 200 and a second portion 110b designed to protrude from said dental implant and to penetrate into the impression material in an impression tray of a system for dental impressions; said second portion has a substantially frusto-conical shape and is provided on its outer surface with a plurality of longitudinal projections 116 and a plurality of longitudinal recesses 118, arranged alternately to each other and mutually connected by rounded connecting surfaces, which gives said surface a sinuous profile.
  • This sinuous profile on the one hand facilitates the insertion into the impression tray, and on the other hand eliminates the risk of deformations of the impression material when being removed from the impression tray.
  • rounded bulges 117 are preferably provided close to the base of said longitudinal recesses 118.
  • the transfer assembly further comprises a removable hollow cap 120, the inner surface of which is complementary to the outer surface of the second portion 110b of the transfer 110: said cap 120 can be fitted on said second portion of said transfer and can remain in the impression tray after removal thereof from the oral cavity.
  • the transfer assembly thus realized guarantees precision in the taking of the impression and, at the same time, allows to dramatically reduce the discomfort experienced by the patient with the systems of the prior art during removal of the impression tray on the dental implants.
  • a corresponding dental analog 10 is provided for each transfer assembly, which dental analog comprises a first portion 10a and a second portion 10b, said first portion 10a being intended to penetrate into the impression material contained in the impression tray, into the impression left by the transfer 110 of the respective transfer assembly.
  • the first portion 10a of the dental analog 10 has a shape and size corresponding to those of the second portion 110b of the corresponding transfer 110, in order to be inserted into the impression left by said second portion 110b of said transfer 110 without the risk of deformations.
  • the transfer assembly also includes a cap 120
  • the shape of the first portion 10a of the dental analog 10 will be complementary to the shape of the inner surface of the cap 120, so as to be inserted into said cap 120 and engage it without the risk of deformations.
  • the first portion 10a therefore has a substantially frusto-conical shape and is provided on its outer surface with a plurality of longitudinal projections 16 and a plurality of longitudinal recesses 18, arranged alternately to each other and mutually connected by rounded connecting surfaces.
  • rounded bulges 17 are provided close to the base of said longitudinal recesses 18.
  • the so shaped first portion 10a of the dental analog 10 can be accurately inserted into the cap 120 of the transfer assembly in the impression tray, thus ensuring accuracy in positioning - including angular positioning - and avoiding the risk of deformations.
  • the second portion 10b of the dental analog 10 has a shape adapted to replicate or represent the shape and arrangement of the corresponding dental implant and ends with an end portion 10d shaped so as to be easily detected through measurement systems commonly used in the field (contour followers, scanners or other optical detecting devices, and so on).
  • the dental analog may further comprise an intermediate portion 10c whose outer surface comprises retention means, so that it can be used for the development of traditional casts by pouring of suitable material, such as plaster.
  • Figure 3 shows an alternative embodiment variant of the dental analog 10 comprising a second portion 10b which advantageously has a particularly simple structure - realized in the form of a solid of revolution - which, therefore, is particularly easy to be detected.
  • first portion 10a and the second portion 10b of the dental analog 10 are coaxially arranged.
  • this provision shall not be construed as limiting.
  • first portion 10a and the second portion 10b of the dental analog 10 are offset relative to each other. Similarly, they could be inclined relative to each other, for example by an angle between 0° and 60°. It is sufficient that they are connected in such a way that a calculation is sufficient for exactly determining the position of the first portion 10a by measuring the second portion 10b (and/or vice versa).
  • portions 10a, 10b of the dental analog 10 are represented as being formed in one piece, it is also possible to provide that the portions 10a, 10b of the dental analog 10 are made as two separate components which are removably coupled to each other.
  • CAM2 measurement solutions are optimal for many applications of "reverse engineering", such as, for example, rapid prototyping and composite material surface control.
  • optical detecting devices it is possible to cover the surface of the second portion 10b of the dental analog 10 with a coating (spray, varnish, and so on) that facilitates the measurement of the same before proceeding to the detecting step.

Landscapes

  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Dental Prosthetics (AREA)
EP15163148.8A 2014-04-14 2015-04-10 Verfahren zur detektion der position von zahnimplantaten, dentalanalog zur durchführung des besagten verfahrens und system zur detektion der position von zahnimplantaten mit besagtem dentalanalog Withdrawn EP2932938A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITVA2014U000015U ITVA20140015U1 (it) 2014-04-14 2014-04-14 Dispositivo analogo di posizione ad uso dentale per sistema per il trasferimento dei dati riguardanti la posizione degli impianti dentali

Publications (1)

Publication Number Publication Date
EP2932938A1 true EP2932938A1 (de) 2015-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP15163148.8A Withdrawn EP2932938A1 (de) 2014-04-14 2015-04-10 Verfahren zur detektion der position von zahnimplantaten, dentalanalog zur durchführung des besagten verfahrens und system zur detektion der position von zahnimplantaten mit besagtem dentalanalog

Country Status (2)

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EP (1) EP2932938A1 (de)
IT (1) ITVA20140015U1 (de)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6068479A (en) * 1995-02-21 2000-05-30 Kwan; Norman Ho-Kwong Dental implant system
US20060228672A1 (en) * 2005-03-17 2006-10-12 Hurson Steven M Transfer coping for dental implants
US20080124676A1 (en) * 2001-08-31 2008-05-29 Leonard Marotta Accurate analogs for prostheses using computer generated anatomical models
KR20130084800A (ko) * 2012-01-18 2013-07-26 오스템임플란트 주식회사 임플란트 어버트먼트를 만드는 방법
EP2712573A2 (de) * 2009-02-26 2014-04-02 Nobel Biocare Services AG Vorrichtung zur Anzeige der Position und Ausrichtung eines Zahnimplantats

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6068479A (en) * 1995-02-21 2000-05-30 Kwan; Norman Ho-Kwong Dental implant system
US20080124676A1 (en) * 2001-08-31 2008-05-29 Leonard Marotta Accurate analogs for prostheses using computer generated anatomical models
US20060228672A1 (en) * 2005-03-17 2006-10-12 Hurson Steven M Transfer coping for dental implants
EP2712573A2 (de) * 2009-02-26 2014-04-02 Nobel Biocare Services AG Vorrichtung zur Anzeige der Position und Ausrichtung eines Zahnimplantats
KR20130084800A (ko) * 2012-01-18 2013-07-26 오스템임플란트 주식회사 임플란트 어버트먼트를 만드는 방법

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Publication number Publication date
ITVA20140015U1 (it) 2014-07-14

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